if __name__ == '__main__':
    weights = [
        [7],
        [5, 8],
        [7, 8, 8],
        [9, 2, 7, 2],
        [8, 1, 4, 9, 1],
        [8, 1, 8, 8, 4, 1],
        [7, 9, 6, 1, 4, 5, 4],
        [5, 6, 5, 5, 6, 9, 5, 6],
        [5, 5, 4, 7, 9, 3, 5, 5, 1],
        [7, 5, 7, 9, 7, 4, 7, 3, 3, 1],
        [4, 6, 4, 5, 5, 8, 8, 3, 2, 4, 3],
        [1, 1, 3, 3, 1, 6, 6, 5, 5, 4, 4, 2],
        [9, 9, 9, 2, 1, 9, 1, 9, 2, 9, 5, 7, 9],
        [4, 3, 3, 7, 7, 9, 3, 6, 1, 3, 8, 8, 3, 7],
        [3, 6, 8, 1, 5, 3, 9, 5, 8, 3, 8, 1, 8, 3, 3],
        [8, 3, 2, 3, 3, 5, 5, 8, 5, 4, 2, 8, 6, 7, 6, 9],
        [8, 1, 8, 1, 8, 4, 6, 2, 2, 1, 7, 9, 4, 2, 3, 3, 4],
        [2, 8, 4, 2, 2, 9, 9, 2, 8, 3, 4, 9, 6, 3, 9, 4, 6, 9],
        [7, 9, 7, 4, 9, 7, 6, 6, 2, 8, 9, 4, 1, 8, 1, 7, 2, 1, 6],
        [9, 2, 8, 6, 4, 2, 7, 9, 5, 4, 1, 2, 5, 1, 7, 3, 9, 8, 3, 3],
        [5, 2, 1, 6, 7, 9, 3, 2, 8, 9, 5, 5, 6, 6, 6, 2, 1, 8, 7, 9, 9],
        [6, 7, 1, 8, 8, 7, 5, 3, 6, 5, 4, 7, 3, 4, 6, 7, 8, 1, 3, 2, 7, 4],
        [2, 2, 6, 3, 5, 3, 4, 9, 2, 4, 5, 7, 6, 6, 3, 2, 7, 2, 4, 8, 5, 5, 4],
        [7, 4, 4, 5, 8, 3, 3, 8, 1, 8, 6, 3, 2, 1, 6, 2, 6, 4, 6, 3, 8, 2, 9, 6],
        [1, 2, 4, 1, 3, 3, 5, 3, 4, 9, 6, 3, 8, 6, 5, 9, 1, 5, 3, 2, 6, 8, 8, 5, 3],
        [2, 2, 7, 9, 3, 3, 2, 8, 6, 9, 8, 4, 4, 9, 5, 8, 2, 6, 3, 4, 8, 4, 9, 3, 8, 8],
        [7, 7, 7, 9, 7, 5, 2, 7, 9, 2, 5, 1, 9, 2, 6, 5, 3, 9, 3, 5, 7, 3, 5, 4, 2, 8, 9],
        [7, 7, 6, 6, 8, 7, 5, 5, 8, 2, 4, 7, 7, 4, 7, 2, 6, 9, 2, 1, 8, 2, 9, 8, 5, 7, 3, 6],
        [5, 9, 4, 5, 5, 7, 5, 5, 6, 3, 5, 3, 9, 5, 8, 9, 5, 4, 1, 2, 6, 1, 4, 3, 5, 3, 2, 4, 1],
        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
    ]
    for i in range(len(weights) - 1):
        for j in range(len(weights[i])):
            weights[i + 1][j] += weights[i][j] / 2
            weights[i + 1][j + 1] += weights[i][j] / 2
    minNum, maxNum = min(weights[-1]), max(weights[-1])
    print(maxNum * 2086458231 / minNum)
